HEIDENHAIN ND 100 User Manual - Manual (Page 55)

ND 120 QUADRA-CHEK 55
1
.9 Er
ro
r Indications
1.9 Error Indications
Scale errors
Only input encoder scale errors are reported. Scale errors are indicated
by the presence of graphic bars across the DRO screen instead of
numbers. Scale errors can be caused by a few conditions shown in
this table:
Possible cause Corrective action
Damaged encoder
reader head Repair or replace the encoder.
Misaligned
encoder reader
head Recalibrate the reader head.
Electrical noise on
the encoder input Verify that the earth ground provided by the
power source is in good condition and is
connected to the power system ground.
Verify that the encoder cable is shielded
and that the shield is connected to ground
at the DRO end.
Verify that the reader head is not generating
electrical noise.
Stage (encoder)
velocity too high Restrict stage velocity. If the velocity
required for error-free operation is slow,
recalibrate the reader head.
Faulty encoder
input connection Repair or replace the encoder cable or seek
the assistance of your HEIDENHAIN
distributor.